ci: Compile assets for workhorse-only MRs

Rémy Coutablerequested to merge
compile-assets-for-workhorse-only-mrs into master

What does this MR do and why?

This adds rules for prerequisite jobs for workhorse-only MRs.

Test MR can be seen at !79821 (closed).

Related to #351794 (closed).

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

Edited by Rémy Coutable

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